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FLANGE STANDARD LIBRARYAX FORGE · SPEC SHEET
SPEC SHEETNo. 492
ASME B16.5 · ASME B16.5-2025

B16.5 Class 150 22″ Slip-On

DN550Slip-OnDimensions mmWeight kg
ASME B16.5 · 22″ (DN550) · Class 150 · Slip-On FlangeASME B16.5 · 22″ (DN550) · Class 150 · Slip-On Flange O.D. D 749.3 Bolt circle K 692.2 20×Ø28.6 Raised face Ø 641.4 Thickness C 44.5 RF height f 1.5 Length H 77.7 Hub Ø A 609.6 Both views share one scale (1:12); schematic only Unit: mm

Schematic — drawn from the table, not to scale for inspection.

SymbolItemValue
DOutside diameter749.3mm
CFlange thickness / blind thickness44.5mm
D2Raised face diameter641.4mm
fRaised face height1.5mm
KBolt circle diameter692.2mm
nNumber of bolt holes20pcs
dBolt hole diameter28.6mm
AHub diameter609.6mm
HHub length / overall length77.7mm

Pressure–temperature ratings · Class 150 · Group 1.1

≤ 38 °C19.6 bar50 °C19.1 bar100 °C17.7 bar150 °C15.8 bar200 °C13.8 bar250 °C12.1 bar300 °C10.2 bar325 °C9.3 bar350 °C8.4 bar375 °C7.4 bar400 °C6.5 bar425 °C5.5 bar450 °C4.6 bar475 °C3.7 bar500 °C2.8 bar538 °C1.4 bar

Source: Table 2-1.1 (printed p. 25) — pressure–temperature ratings for Group 1.1 materials, SI units; Group 1.1.

Material and notes

Base material: ASTM A105 (North America, Middle East, South-East Asia)

Rating: ASME classes are not fixed pressures. For ASTM A105 (material group 1.1) the ASME B16.5-2025 ambient rating is 285 psi (19.6 bar) at Class 150, 740 psi (51.0 bar) at Class 300, 985 psi (68.0 bar) at Class 400, 1,480 psi (102.0 bar) at Class 600, 2,2…

Tolerances / marking: Tolerances, facing finish, material and marking requirements: ASME B16.5-2025 Sections 6 and 7.

Notes / special requirements

Work order Inspector Date Travels with the part; file after inspection